On Wednesday, a 1,000-person caravan making its way north through Mexico while traveling to the United States decided to abandon its plan of reaching the U.S. after President Donald Trump announced on Tuesday that he was deploying the military to the Southern Border to increase border security.

“We will wrap up our work in Mexico City,” said Irineo Mujica, head of the migrant advocacy group Pueblo sin Fronteras, AFP reported.

“We have support teams at the border if there are people who need assistance there, but they would have to travel on their own,” Mujica said. “There are too many children — 450 in all. There are lots of babies. Hopping the train, as we did in the past, would have been crazy.”

Department of Homeland Security Secretary Kirstjen Nielsen announced on Wednesday that Trump is going to sign a proclamation today that will direct Homeland Security and the Department of Defense to work with states to deploy the National Guard to the U.S.-Mexico border.

Mujica also told the AFP that he thinks that Trump “wanted the world to crush us, to erase our existence. But Mexico responded admirably and we thank the government for the way it handled this caravan.”